I anchor in a mix of sand and rock/coral... mostly rock. And mostly around the Monterey bay area. A few times a year in the mud/muck of the CA delta. Looking at anchors the Manson 15# supreme (scoop design) seems like the best bet. Anyone with actual experience versus my "this looks good on paper"?

Monterey is rock and sand. Danforth types are probably the most popular with local boaters; Bruce types (Bruce, and Lewmar knock-offs) work pretty well. Solid plow types work well in sand, but often tend to get hung up in rocky areas (not that the others don't; just not as often.) The folding grapnel ones are useless - they drag in sand and lock up in rock.